/*
 * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <arch.h>
#include <arch_helpers.h>
#include <assert.h>
#include <auth_mod.h>
#include <bl_common.h>
#include <bl1.h>
#include <console.h>
#include <debug.h>
#include <platform.h>
#include <platform_def.h>
#include <stdint.h>

/*******************************************************************************
 * This function is responsible to:
 * Load SCP_BL2U if platform has defined SCP_BL2U_BASE
 * Perform platform setup.
 * Go back to EL3.
 ******************************************************************************/
void bl2u_main(void)
{
    NOTICE("BL2U: %s\n", version_string);
    NOTICE("BL2U: %s\n", build_message);

#if SCP_BL2U_BASE
    int rc;
    /* Load the subsequent bootloader images */
    rc = bl2u_plat_handle_scp_bl2u();
    if (rc) {
        ERROR("Failed to load SCP_BL2U (%i)\n", rc);
        panic();
    }
#endif

    /* Perform platform setup in BL2U after loading SCP_BL2U */
    bl2u_platform_setup();

    console_flush();

#ifdef AARCH32
    /*
     * For AArch32 state BL1 and BL2U share the MMU setup.
     * Given that BL2U does not map BL1 regions, MMU needs
     * to be disabled in order to go back to BL1.
     */
    disable_mmu_icache_secure();
#endif /* AARCH32 */

    /*
     * Indicate that BL2U is done and resume back to
     * normal world via an SMC to BL1.
     * x1 could be passed to Normal world,
     * so DO NOT pass any secret information.
     */
    smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0);
    wfi();
}
